/**
 * 
 */function ajax(url,data){
	 var num;
	 $.ajax({
		 url: url,
	        type: "post",
	        data: data,
	        dataType: "json",
	        async:false,//同步
	        success: function(e) {
	        	num = e;
	        }
	 })
	 return num;
 }